Note 3 - Fair Value Measurements - Unobservable Inputs Assumptions (Details)	Mar. 31, 2023	Dec. 31, 2022
Measurement Input, Exercise Price [Member]
Deriviative, measurement input	0.4431	0.4431
Measurement Input, Expected Term [Member]
Deriviative, measurement input	1.07	1.32
Measurement Input, Price Volatility [Member]
Deriviative, measurement input	1.050	1.000
Measurement Input, Risk Free Interest Rate [Member]
Deriviative, measurement input	0.046	0.046
Measurement Input, Expected Dividend Rate [Member]
Deriviative, measurement input	0	0